JPS5465317A - Motor drive unit - Google Patents
Motor drive unitInfo
- Publication number
- JPS5465317A JPS5465317A JP13098377A JP13098377A JPS5465317A JP S5465317 A JPS5465317 A JP S5465317A JP 13098377 A JP13098377 A JP 13098377A JP 13098377 A JP13098377 A JP 13098377A JP S5465317 A JPS5465317 A JP S5465317A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- relay
- shortcircuiting
- semiconductor device
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To protect a speed control semiconductor device from the start inrush current by setting up a shortcircuiting circuit in parallel with it and holding the circuit for a fixed time until start stationary revolution, then switching it into the semiconductor speed control.
CONSTITUTION: A speed control circuit to control the speed of a motor 3 by the load current of a power transistor (semiconductor device) and a relay 5 to selectively switch a shortcircuiting circuit which shortcircuits it are set up and its ever- close contacts 5b and 5c form the shortcircuiting circuit and control circuit, respectively. This relay 5 and the relay 4 to perform the start opening and closing of the motor 3 are connected in series. When the ever-open contact 4b of the relay 4 closes, the shortcircuiting circuit is held for a fixed time by the contact 5b of the relay 5. At stationary revolution, a transistor 7 turns ON by a time limit circuit 11 and a start detection transistor 12, then the shortcircuiting circuit is switched into the control circuit by the contact 5c. As a result, the semiconductor device can be protected from the motor start inrush current.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13098377A JPS5465317A (en) | 1977-11-01 | 1977-11-01 | Motor drive unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13098377A JPS5465317A (en) | 1977-11-01 | 1977-11-01 | Motor drive unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5465317A true JPS5465317A (en) | 1979-05-25 |
Family
ID=15047163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13098377A Pending JPS5465317A (en) | 1977-11-01 | 1977-11-01 | Motor drive unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5465317A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56159979A (en) * | 1980-05-12 | 1981-12-09 | Diesel Kiki Co Ltd | Revolution controlling circuit for dc motor |
JPS5715694U (en) * | 1980-07-01 | 1982-01-27 |
-
1977
- 1977-11-01 JP JP13098377A patent/JPS5465317A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56159979A (en) * | 1980-05-12 | 1981-12-09 | Diesel Kiki Co Ltd | Revolution controlling circuit for dc motor |
JPS6249833B2 (en) * | 1980-05-12 | 1987-10-21 | Diesel Kiki Co | |
JPS5715694U (en) * | 1980-07-01 | 1982-01-27 |
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